Fins and spines on the casting is seen due to_______________?

Related Mcqs:

1. Casting flux is used to_______________?

   A. Prevent the oxidation of the metal during melting B. increase the melting point of the flux C. Flaring the point of the sprue attachment D. None of the above...

2. Mental spines provide attachment to_____________?

   A. Genioglossus B. Anterior & Posterior bellies of digastric C. Mylohyoid D. Superior constrictor of pharynx...

3. Schuffner’s dots are seen in infection due to_______________?

   A. Plasmodium falciparum B. Plasmodium vivax C. Plasmodium malariae D. Plasmodium ovale...

4. Resistance to corrosion in a cobalt-chrome casting is due to presence of_______________?

   A. High quality iron B. Chrome C. Cobalt D. Nickel...

5. Glossy smooth margins of a casting are due to_____________?

   A. Shrinkage of alloy on cooling B. Investment breakdown C. Incomplete wax elimination D. Incomplete gas elimination...

6. Air bubbles formed on the surface of casting is probably due to________________?

   A. Improper casting pressure B. Improper heating of the investment C. Improper angulation of sprue D. Improper wetting of the wax pattern by the investment...

7. Gap between true end of casting ring and wax pattern should be______________?

   A. ¼ inch B. ½ inch C. 3/8 inch D. one inch...

8. Reduction in the fusion temperature of dental gold casting alloys is caused by presence of______________?

   A. Platinum B. Copper C. Silver D. Gold...

9. Titanium casting is done_____________?

   A. Under vacuum in argon atmosphere B. Under air pressure in nitrogen atmosphere C. In specially fabricated aluminium vanadium D. Using CAD-CAM technique...

10. Modern dental noble metal casting alloys generally have equiaxed fine grain structures because of the incorporation of small amounts of______________?

    A. Chromium B. Indium C. Irridium D. Palladium...